JPH0311852B2 - - Google Patents
Info
- Publication number
- JPH0311852B2 JPH0311852B2 JP63148148A JP14814888A JPH0311852B2 JP H0311852 B2 JPH0311852 B2 JP H0311852B2 JP 63148148 A JP63148148 A JP 63148148A JP 14814888 A JP14814888 A JP 14814888A JP H0311852 B2 JPH0311852 B2 JP H0311852B2
- Authority
- JP
- Japan
- Prior art keywords
- bulge
- hydraulic
- punch
- slide
- hydraulic pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 14
- 239000012530 fluid Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、液圧バルジ成形法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hydraulic bulge forming method.
従来、口が小さく胴部がふくらんだ成形品を得
る方法として、液圧バルジ成形法が知られてい
る。この方法は絞り加工後、被成形物内へ高圧を
作用させ、胴部の材料を伸ばすことで行われる。
BACKGROUND ART Hydraulic bulge molding is conventionally known as a method for obtaining molded products with a small mouth and a bulging body. This method is carried out by applying high pressure to the object to be formed after drawing to stretch the material of the body.
しかし、この方法では、胴部の材料伸び分だけ
しかふくらますことができず、さらに絞り加工後
の加工となるため、材料の伸び量も多くなり、従
つて大きなふくらみを得ることができなかつた。 However, with this method, it is only possible to inflate by the amount of material elongation in the body, and since the process is performed after drawing, the amount of elongation of the material increases, and therefore, it is not possible to obtain a large bulge.
この欠点を解決する手段として、絞り加工とバ
ルジ加工の間に焼鈍工程を加える方法や、バルジ
加工時に被成形物のつば部または底部を軸方向に
圧縮するような方法がある。しかし、このような
方法は多工程となり、生産能率が悪くなる。後者
の方法において、一工程で成形する方法もある
が、軸方向圧縮を加える関係から非常に複雑な金
型を用いなければならず、製造コストが高くなる
という問題があつた。 As a means to solve this drawback, there are a method of adding an annealing process between the drawing process and the bulge process, and a method of compressing the collar or bottom of the molded object in the axial direction during the bulge process. However, such a method involves multiple steps, resulting in poor production efficiency. In the latter method, there is a method of molding in one step, but since axial compression is applied, a very complicated mold must be used, resulting in a problem of high manufacturing costs.
本発明は前記問題点を解決するために創案され
たもので、その目的とするところは、絞り形状に
おける開口部より胴部の方が大きくふくらみ、こ
とに成形品フランジ近傍に内側方向に大きくくび
れた形状の成形品を１工程で、しかも簡単な金型
構造により作ることができる液圧バルジ成形法を
提供することにある。 The present invention was devised to solve the above-mentioned problems, and its purpose is that the body bulges out more than the opening in the aperture shape, and in particular, the shape of the flange of the molded product has a large constriction inward. To provide a hydraulic bulge molding method capable of producing a molded article having a shape in one step and using a simple mold structure.
上記目的を達成するため本発明は、液圧バルジ
成形にあたり、側面が凹入したポンチを用いて素
材を凹入形状に対向液圧絞り成形した後、ポンチ
内から液圧を送給して凹入部分をバルジ成形する
ようにしたものである。
In order to achieve the above object, the present invention involves hydraulic bulge forming, in which a punch with recessed sides is used to form a material into a recessed shape using hydraulic pressure, and then hydraulic pressure is supplied from within the punch to form the recessed shape. The inlet part is bulged.
以下本発明の実施例を添付図面に基いて説明す
る。
Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図は本発明の実施に用いる装置の概要を示
している。 FIG. 1 shows an overview of the apparatus used to carry out the invention.
１は周囲に上方に延びる支承部１ａを備えた外
側バツクアツプブロツクである。該外側バツクア
ツプブロツク１の内側には、１組の割型ダイス
２，２′が配されている。それら割型ダイス２，
２′は上端に材料Ｗの載置面２ｃ，２c′を有し、
内側には成形品形状に対応する凹入面２ｂ，２
b′を備えている。そして、凹入面２ｂ，２b′より
下部の対向側面には穴２１，２１′が形成されて
おり、該穴２１，２１′間にスプリング２３が配
され、そのばね力によつて両割型ダイス２，２′
を外側バツクアツプブロツク１に付勢するように
なつている。また、割型ダイス２，２′と支承部
１ａにはガイド用の勾配２２，１０が形成されて
いる。 Reference numeral 1 designates an outer back up block having a supporting portion 1a extending upwardly around its periphery. A pair of split dies 2, 2' are arranged inside the outer back-up block 1. Those split dice 2,
2' has a mounting surface 2c, 2c' for the material W at the upper end,
On the inside, there are concave surfaces 2b, 2 that correspond to the shape of the molded product.
It has b′. Holes 21 and 21' are formed in the opposing side surfaces below the recessed surfaces 2b and 2b', and a spring 23 is disposed between the holes 21 and 21', and the spring force causes the split mold to be formed. Dice 2, 2'
is adapted to bias the outer backup block 1. Further, guide slopes 22, 10 are formed on the split dies 2, 2' and the support portion 1a.
３はポンチであり、平坦な底面３ａを有すると
共に、側面３ｂにくびれ状の凹入部３０が形成さ
れている。前記ポンチ３はインナスライドにより
昇降されるようになつていてもよいが、図示のも
のではスライド７に結合され、主プレス３２によ
り昇降されるようになつている。 Reference numeral 3 designates a punch, which has a flat bottom surface 3a and a constricted recessed portion 30 formed on a side surface 3b. The punch 3 may be moved up and down by an inner slide, but in the illustrated example, it is coupled to a slide 7 and moved up and down by a main press 32.
４はアウタースライドで、下部に材料Ｗのシワ
押えをするためのブランクホルダ５を有すると共
に、前記外側バツクアツプブロツク１と共に割型
ダイス２，２′の締付けを行うための内側バツク
アツプブロツク６を有している。アウタースライ
ド４は主プレス３２のまわりを外囲するように設
けられた環状スライドに固定され、主プレス３２
と独立したプレスにより昇降する構造としてもよ
いが、本実施例では主プレス３２により作動され
るスライド７そのものの内部にシリンダ８，８を
内蔵固定し、このシリンダ８，８からスライド７
を貫いてプランジヤ８１，８１を伸出させ、プラ
ンジヤ８１の下端にアウタースライド４を連結さ
せている。 Reference numeral 4 denotes an outer slide, which has a blank holder 5 at its lower part for suppressing wrinkles in the material W, and an inner back-up block 6 for tightening the split dies 2, 2' together with the outer back-up block 1. have. The outer slide 4 is fixed to an annular slide provided so as to surround the main press 32.
However, in this embodiment, the cylinders 8, 8 are internally fixed inside the slide 7 itself, which is operated by the main press 32, and the slide 7 is moved up and down from the cylinders 8, 8.
Plungers 81, 81 extend through the outer slide 4, and the outer slide 4 is connected to the lower end of the plunger 81.
そして、前記割型ダイス２，２′の少なくとも
一方には絞り液圧給排通路２００が設けられ、外
部のポンプを含む液圧制御装置Ａと配管２１０に
より結ばれている。またポンチ３には凹入部３０
に開孔するバルジ液圧給排通路３００が設けら
れ、外部のバルジ液圧発生装置Ｂに接続されてい
る。 A throttle fluid pressure supply/discharge passage 200 is provided in at least one of the split dies 2, 2', and is connected to a fluid pressure control device A including an external pump via a pipe 210. Also, the punch 3 has a recessed part 30.
A bulge hydraulic pressure supply/discharge passage 300 is provided and is connected to an external bulge hydraulic pressure generator B.
成形にあたつては、第１図のように分離状態に
ある割型ダイス２，２′の載置面２ｃ，２c′に材
料Ｗを配置する。次いで主プレス３２を作動して
スライド７を下降させる。これによりアウタース
ライド４が下降し、内側バツクアツプブロツク６
の先端６ａが外側バツクアツプブロツク１の勾配
２２と割型ダイスの勾配１０によつて形成された
ガイド部を介して進入し、さらに内側バツクアツ
プブロツク６の側面が支承部内壁に接して下降す
ることにより、割型ダイス２，２′はスプリング
２３に抗して接近させられ、第２図のように一体
化されるように締付けられ、凹入面２ｂ，２b′に
よりドームＣが形成される。この状態になつたと
きに液圧制御装置Ａから非圧縮性流体が配管２１
０、絞り液給排通路２００を通してドームＣに供
給される。一方、内側バツクアツプブロツク６の
下降と共に、ブランクホルダ５も下降するため、
これと載置面２ｃ，２c′とにより材料Ｗのシワ押
えが行われる。 For forming, the material W is placed on the mounting surfaces 2c, 2c' of the split dies 2, 2' which are in a separated state as shown in FIG. Next, the main press 32 is operated to lower the slide 7. As a result, the outer slide 4 descends and the inner back up block 6
The tip 6a enters through the guide portion formed by the slope 22 of the outer back up block 1 and the slope 10 of the split die, and then the side surface of the inner back up block 6 comes into contact with the inner wall of the support and descends. As a result, the split dies 2 and 2' are brought closer together against the spring 23 and are tightened so as to be integrated as shown in FIG. 2, and a dome C is formed by the concave surfaces 2b and 2b'. . When this state is reached, incompressible fluid is supplied from the hydraulic pressure control device A to the pipe 21.
0, the throttle fluid is supplied to the dome C through the throttle fluid supply and discharge passage 200. On the other hand, as the inner back up block 6 descends, the blank holder 5 also descends.
This and the mounting surfaces 2c and 2c' suppress wrinkles in the material W.
さらに、主プレスを介してスライド７を下降さ
せると、ポンチ３の底部３ａが材料Ｗに接し、ポ
ンチ３がさらに下降して材料ＷがドームＣ内に押
込まれることにより、ドーム内に対向液圧Pcが
生じ、この対向液圧Pcにより材料Ｗはポンチ３
の底部３ａおよび側面３ｂに巻付けられるように
絞り込まれるが、ポンチ３には側面３ｂに凹入部
３０が形成されているため、この絞り成形時に材
料Ｗは、対向液圧Pcにより第３図のように凹入
部３０の形状に倣うように変形される。この絞り
工程は成形体W′が割型ダイス２，２′のドーム底
に接するように底突きされることで終了し、対向
液圧制御装置ＡによりドームＣ内にあつた液は戻
される。 Further, when the slide 7 is lowered through the main press, the bottom 3a of the punch 3 comes into contact with the material W, and the punch 3 is further lowered and the material W is pushed into the dome C, causing the opposing liquid to flow into the dome. A pressure Pc is generated, and this opposing hydraulic pressure Pc pushes the material W into the punch 3.
However, since the punch 3 has a concave portion 30 formed in the side surface 3b, the material W is drawn into the shape shown in FIG. 3 by the opposing hydraulic pressure Pc during this drawing process. It is deformed so as to follow the shape of the recessed part 30. This drawing process ends when the molded body W' is bottomed out so as to come into contact with the dome bottoms of the split dies 2, 2', and the liquid in the dome C is returned by the opposing hydraulic pressure control device A.
対向液圧絞り成形が完了したならば、第４図の
ように高圧のバルジ液圧発生装置Ｂからポンチ３
内のバルジ液圧給排孔３００を経て成形体W′の
凹入成形部ｗに向かつて供給される。これにより
凹入成形ｗは強力なバルジ液Pbの作用でふくら
まされ、割型ダイス２，２′の凹入面２ｂ，２
b′に沿う形状に塑性変形される。次いでバルジ液
圧発生装置Ｂによりバルジ液は成形体W′から排
出される。 When the opposed hydraulic drawing process is completed, as shown in Fig. 4, the high pressure bulge hydraulic pressure generating device B is
It is supplied to the concave molded part w of the molded body W' through the bulge hydraulic supply and discharge hole 300 inside. As a result, the concave molding w is swollen by the action of the powerful bulge liquid Pb, and the concave surfaces 2b, 2 of the split dies 2, 2'
It is plastically deformed into a shape along b′. Then, the bulge liquid is discharged from the compact W' by the bulge liquid pressure generator B.
これでバルジ成形は完了し、主プレス３２によ
りスライド７は上昇限まで引き上げられ、アウタ
ースライド４も自動的に上昇するため、第５図の
ように割型ダイス２，２′はスプリング２３の復
元力により拡開される。そこであとは割型ダイス
２，２′内に残されている製品W″を取出せばよ
い。 This completes the bulge forming, and the main press 32 pulls up the slide 7 to its upper limit, and the outer slide 4 also rises automatically, so the split dies 2 and 2' restore the spring 23 as shown in Figure 5. Expanded by force. All that is left to do then is to take out the product W'' left inside the split dies 2, 2'.
以上説明した本発明によれば、対向液圧絞り工
程において、成形物を直筒状でなく内方に凹入し
た形状に成形してから液圧バルジ成形を行うた
め、被成形物側面の表面積を大きくすることがで
き、バルジ液圧によりふくらますことのできる量
は材料の伸び分に加え、表面積増加分だけ増すこ
とができる。そのため、開口部下がくびれ、その
下に大きなふくらみを持つた成形品を、１工程で
しかも軸方向圧縮力を掛けずに簡単な金型構造で
成形することができるというすぐれた効果が得ら
れる。
According to the present invention described above, in the opposed hydraulic drawing process, the molded product is not shaped into a straight cylinder shape but into an inwardly concave shape and then subjected to hydraulic bulge forming, so that the surface area of the side surface of the molded product is reduced. The amount that can be expanded by bulge hydraulic pressure can be increased by the amount of elongation of the material plus the increase in surface area. Therefore, an excellent effect can be obtained in that a molded product having a constriction at the bottom of the opening and a large bulge below the opening can be molded in one step and with a simple mold structure without applying an axial compressive force.
第１図は本発明の実施に用いる装置の一例を示
す断面図、第２図ないし第５図は本発明による液
圧バルジ成形法を段階的に示す断面図である。
２，２′…割型ダイス、３……ポンチ、３０…
…凹入部。
FIG. 1 is a cross-sectional view showing an example of an apparatus used to carry out the present invention, and FIGS. 2 to 5 are cross-sectional views showing step-by-step the hydraulic bulge forming method according to the present invention. 2, 2'...split die, 3...punch, 30...
...Recessed part.
Claims (1)
ンチを用いて素材を凹入形状に対向液圧絞り成形
した後、ポンチ内から液圧を送給して凹入部分を
バルジ成形することを特徴とする液圧バルジ成形
法。1. In hydraulic bulge forming, a punch with recessed sides is used to form the material into a recessed shape using opposing hydraulic pressure, and then hydraulic pressure is supplied from within the punch to form a bulge in the recessed part. Hydraulic bulge forming method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63148148A JPH01317627A (en) | 1988-06-17 | 1988-06-17 | Forming of hydraulic bulge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63148148A JPH01317627A (en) | 1988-06-17 | 1988-06-17 | Forming of hydraulic bulge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01317627A JPH01317627A (en) | 1989-12-22 |
| JPH0311852B2 true JPH0311852B2 (en) | 1991-02-18 |
Family
ID=15446335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63148148A Granted JPH01317627A (en) | 1988-06-17 | 1988-06-17 | Forming of hydraulic bulge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01317627A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130085116A (en) * | 2012-01-19 | 2013-07-29 | 엘지전자 주식회사 | Display device |
| CN108136475A (en) * | 2015-09-15 | 2018-06-08 | 株式会社Posco | Product compression-moulding methods and equipment and product |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012039399A1 (en) * | 2010-09-21 | 2012-03-29 | 本田技研工業株式会社 | Press-forming method and press-forming device |
| CN111112430B (en) * | 2019-12-16 | 2022-01-04 | 中国航发南方工业有限公司 | Composite compensation springback forming method for revolving body parts |
-
1988
- 1988-06-17 JP JP63148148A patent/JPH01317627A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130085116A (en) * | 2012-01-19 | 2013-07-29 | 엘지전자 주식회사 | Display device |
| CN108136475A (en) * | 2015-09-15 | 2018-06-08 | 株式会社Posco | Product compression-moulding methods and equipment and product |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01317627A (en) | 1989-12-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |